add support for future (H1 2020) G4 devices

cmake/stm32/devices.cmake

@@ -646,6 +646,21 @@ set(STM32_ALL_DEVICES
     G484QE
     G484RE
     G484VE
+    G491CC
+    G491KC
+    G491MC
+    G491RC
+    G491VC
+    G491CE
+    G491KE
+    G491ME
+    G491RE
+    G491VE
+    G4A1CE
+    G4A1KE
+    G4A1ME
+    G4A1RE
+    G4A1VE
     GBK1CB
     H742AG
     H742AI

cmake/stm32/g4.cmake

@@ -1,14 +1,18 @@
 set(STM32_G4_TYPES 
     G431xx G441xx G471xx G473xx G483xx G474xx G484xx
+    G491xx G4A1xx
 )
 set(STM32_G4_TYPE_MATCH 
     "G431.." "G441.." "G471.." "G473.." "G483.." "G474.." "G484.."
+    "G491.." "G4A1.."
 )
 set(STM32_G4_RAM_SIZES 
      32K  32K 128K 128K 128K 128K 128K
+    112K 112K
 )
 set(STM32_G4_CCRAM_SIZES 
       0K   0K   0K   0K   0K   0K   0K
+      0K   0K
 )
 
 stm32_util_create_family_targets(G4)